AI Card "tool progress" cards created with finalize=False were left in
streaming state on DingTalk's UI after a gateway restart because
disconnect() called _streaming_cards.clear() without first closing
them via _close_streaming_siblings.
Move the finalization loop before self._http_client.aclose() so the
HTTP client is still available when the finalize requests are sent.
Adds a regression test that asserts the HTTP client is alive during
finalization.
AhmetArif0
39b8d1d313